Description
DS18 PRO-X57.4BM
The DS18 PRO‑X57.4BM is a 5×7‑inch dual‑4‑ohm mid/bass speaker engineered to deliver dynamic, punchy, and clear low‑mid frequency performance in car audio systems. Rated at 350 W RMS and 700 W peak power handling, this speaker provides robust midrange and low‑end output with excellent control and minimal distortion at high listening levels. Constructed with a rigid cone, durable frame, and high‑temperature voice coil, the PRO‑X57.4BM is ideal for door panels, rear decks, or custom mid/bass enclosures where space may be limited but performance is essential. Whether used in daily driver upgrades, custom installs, or SPL‑focused systems, it delivers strong mid/bass presence and clarity throughout your vehicle’s soundstage.
Specifications
| Parameter | Value |
|---|---|
| Nominal Diameter | 4×6″ / 102 × 152 mm |
| Nominal Impedance | 4 Ohms |
| RMS Power Handling | 175 W |
| MAX Power Handling | 350 W |
| Sensitivity (1w/1m) | 90 dB |
| Frequency Response | 100 Hz – 12.5 kHz |
| Recommended Hi-Pass Crossover | 125 Hz |
| Sold | Single |
| Grill Included | No |
Motor & Construction
| Component | Specification |
|---|---|
| Voice Coil Diameter | 1″ / 25.4 mm |
| Voice Coil Former Material | Kapton |
| Winding Material | CCAW |
| Cone Material | Paper |
| Bullet Material | Aluminum |
| Bullet Color/Finish | Red Gloss |
| Surround Material | Cloth |
| Basket Material | Steel |
| Basket Color/Finish | Red Gloss |
| Magnet Material | Ferrite |
| Magnet Weight | 10 Oz |
| Displacement Volume | 0.14 L / 0.0049 ft³ |
Thiele & Small Parameters
| Parameter | Value |
|---|---|
| Equivalent Volume (Vas) | 2.44 L / 0.086 ft³ |
| Excursion (Xmax, one way) | 1.3 mm |
| Free Air Resonance (Fs) | 158 Hz |
| Mechanical Q (Qms) | 7.012 |
| Electrical Q (Qes) | 0.533 |
| Total Q (Qts) | 0.495 |
| Mechanical Mass (Mms) | 3.772 g |
| Mechanical Compliance (Cms) | 0.0273 mm/N |
| BL Factor | 4.87 |
| Voice Coil Inductance (Le) | 0.134 mH |
| Cone Area (Sd) | 84.95 cm² |
| DC Resistance (Re) | 3.3 Ohms |
Measurements
| Measurement | Value |
|---|---|
| Overall Diameter | 4.1 × 6.1″ / 104 × 155 mm |
| Overall Depth | 2.45″ / 62.2 mm |
| Front Mount Baffle Cutout | 3.4 × 5.6″ / 86.4 × 142 mm |
| Mounting Depth | 2.26″ / 57.3 mm |
| Motor Diameter | 2.76″ / 70 mm |
Product Overview
5×7” Mid-Range Loudspeaker with Bullet
DS18’s PRO-X57.4BM is a heavy-duty 5×7” mid-range loudspeaker with bullet made for pure vocals and mids without distortion or drop-off at any volume. Rated at 175W RMS and 350W MAX at 4 ohms, this speaker brings clarity that cuts through chaos.
Massive Output
With a 94dB sensitivity rating, the PRO-X57.4BM gets loud easy, and its 100Hz–8kHz frequency response is the sweet spot for vocals, guitars, snares, and more. Paired with a sub, this speaker performs like a boss every time!
Pro-Level Construction
The oversized 1.5” CCAW voice coil is wound on a Kapton former, giving you high-temp resistance and long-term performance at full blast. Powered by a 20 oz ferrite magnet, this driver delivers midrange frequencies with razor-sharp control.
Focused Power with Aluminum Bullet
The aluminum bullet centers your sound and directs it with precision: making this speaker perfect for Fords, Mustangs, or upgrading stock speakers in similar vehicles!
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